Question: What academic subject is Euler's identity the discoverer of?
Paraphrase: Which academic subject is the discoverer's identity of Euler?
SPARQL (Wikidata): SELECT ?answer WHERE { wd:Q204819 wdt:P61 ?X . ?X wdt:P101 ?answer}
Answer: astronomy, mathematics, mathematical analysis, number theory, optics, mechanics, ballistics, music theory, calculus of variations, shipbuilding, theory of differential equations